On mycentosserver,I alreadywhmandcpanel. I do not understandhow to configuremy existingapacheto runwithfms. And Ido not knowat allhow to checkif myfmsinstallation is correct, because Ican notaccess theadministrationconsole....

The FMS apache just runs by default on port 8134. FMS listens to port 80 and forwards web server connections on port 80 to port 8134. You can change this in the fms.ini file. You should either not have FMS listen to port 80, or have apache listen to port 8134.

If this is not helpful, you should explain "configuremy existingapacheto run withfms" further.